EE is just for DL. DL gets so much more crowded than DCA that it wouldn't be a great benefit to have an EE at DCA. A portion of DCA generally opens 1/2 hour prior to published opening. Soarin' is the only ride that is opened during this 1/2 hour. You can also visit some of the shops around the plaza. Also, there is an option for guests of GCH that allows for visiting DCA prior to opening. I've forgotten how that works since I've never taken advantage of it.